Seven people were killed and 16 others injured after their vehicle rolled off the road Tuesday in Inner Mongolia Autonomous Region, Xinhua reported. The accident took place at about 12:30 p.m. when a 27-seat passenger bus carrying 23 people suddenly fell off a road and plunged into a four-meter-deep ravine in Ningcheng County, Chifeng City, the county government said. Five people were killed at the site and two others died in the hospital after emergency treatment failed. The injured were rushed to the hospital. Traffic police were investigating the accident.